AngularJS angular-animate bug in 1.4.0 vs 1.2.1? Animation behaves differently from one version to the other

Question

Refer to this two examples of an animation using angular-animate, in both cases I am using the exact same code, I only upgrade the angular and angular-animate versions from 1.2 to 1.4, and the whole sliding animation is totally different, I believe it is a bug, do you think so?

It is mandatory to include some code along with the links, so I did, however the code is irrelevant as it is the exact same code for both cases.

EDIT: I am using the latest documentation for this code.

http://jsfiddle.net/a453t3dx/

    <div ng-controller="controller">
    <div class="animate-show" ng-click="goToSlide(1)" ng-class="{forward: direction, backward: !direction}" ng-show="stepWizard==1">1</div>
    <div class="animate-show" ng-click="goToSlide(2)" ng-class="{forward: direction, backward: !direction}" ng-show="stepWizard==2">2</div>
    <div class="animate-show" ng-click="goToSlide(3)" ng-class="{forward: direction, backward: !direction}" ng-show="stepWizard==3">3</div>
    <button ng-click="goToSlide(stepWizard-1)">Previous</button>
    <button ng-click="goToSlide(stepWizard+1)">Next</button>    
</div>

http://jsfiddle.net/a453t3dx/3/

    <div ng-controller="controller">
    <div class="animate-show" ng-click="goToSlide(1)" ng-class="{forward: direction, backward: !direction}" ng-show="stepWizard==1">1</div>
    <div class="animate-show" ng-click="goToSlide(2)" ng-class="{forward: direction, backward: !direction}" ng-show="stepWizard==2">2</div>
    <div class="animate-show" ng-click="goToSlide(3)" ng-class="{forward: direction, backward: !direction}" ng-show="stepWizard==3">3</div>
    <button ng-click="goToSlide(stepWizard-1)">Previous</button>
    <button ng-click="goToSlide(stepWizard+1)">Next</button>    
</div>